I've upgraded several sites from D6 to D7 without a hitch … then for a reason a can't fathom my latest site is not displaying correctly.
I've got D7.0, using the default Bartik 7.0 theme, and all my pages are visible. However. All the blocks, including main content, are located one after the other on the left hand side.
So the main menu is listed on the left, then the admin menu, and so on to the page and footer content. Nothing is in the middle or right hand side of the screen.
Bizarrely, when I update.php the initial warning page appears correctly on the screen, then when I click on 'Continue' the page telling me there are no pending updates displays correctly, but as soon as I click on the 'Front Page' or 'Administration Pages' link I'm back to pages that don't display correctly.
Also bizarrely, the log is not showing any errors, and neither is the status page. It's 'just' a matter of display not content and it appears to me like a theme issue, but changing themes doesn't fix it.
The fact that the update.php pages appear correctly makes me think it's nothing serious, but I've been trying to sort this out for some time now without getting anywhere.
Anyone else had a similar problem and know how to fix it?
SOLVED
Just in case anyone else has the same problem